I bought a set of 700 mile midnight silver wheels only for $400 locally. But normally they are priced closer to $600-$800 on the classified section here and on Craigslist. Add in tires and you'll usually see the set go between $800-$1000. Pricing obviously correlates to supply and demand. If there are a lot of guys selling off the 20" wheels, then buyers have more options and can (& will) push for a lower price. Most buyers will want an entire set (wheels + tires) for $800 and they completely ignore the fact that buying the P-Zeros alone will run them about $800 retail.

One last thing, you might sell them more quickly if you piece them out. Some of us want to run the rear 20x9's all the way around and there are a few unlucky drivers that need new front wheels after curbing theirs. Just a thought...